Working Vintage Rolex GMT Master reference 6542. Circa 1968. Serial number 1926963. Caliber 1066 25 jewel movement. The rotating bezel is red and blue bakelite. Bezel insert later reproduction, and dial original Rolex service dial. Measures 38mm including bezel. Good overall condition with wear to case. Not tested for accuracy and may require cleaning or routine service. Hill Auction Gallery in house USA continental shipping $45 plus insurance. Gallery will refer local shipper for international buyers. Purchaser pick up available upon request.